John Manners, 3rd Duke of RutlandKGPC (21 October 1696 – 29 May 1779) was an English nobleman, the eldest son of John Manners, 2nd Duke of Rutland and Catherine Russell. Styled Marquess of Granby from 1711, he succeeded to the title in 1721, cutting short a brief career in the House of Commons, where he had represented Rutland as a Whig.